<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			if(true) {
				console.log('true');
			}
			if(0) {// false
				console.log('0');
			}
			if(!0) {//true
				console.log('!0');
			}
			if(1) {//true
				console.log('1');
			}
			if('') {//false
				console.log('空字符串');
			}
			if('abc') {//true
				console.log('abc');
			}
		</script>
	</head>
	<body>
	</body>
</html>
